Answer with Explanation:
We are given that
Diameter of pipe,


Volume flow rate of the petroleum along the pipe=

By equation of continuity







1 m=100 cm
Answer:
b
Explanation:
this is because inoder. for combustion or burning to take place oxygen must be available
When a valence electron absorbs energy in the form of heat or light it uses that energy to jump to an excited state (outer level)